实现strcmp 函数。

【参考答案】int m ystrcmp(const c har* str1, const char* str2){assert((str1 != NULL) && (str2 != NULL));int r et = 0;while (!(ret = (unsigned char)str1 - * (unsigned char*)str2) && *str2){str1++;str2++;}if (ret > 0)ret = 1;else if (ret < 0)ret = -1;return ret;}